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EARTHQUAKE INCIDENCE ANGLE INFLUENCE ON SEISMIC PERFORMANCE OF REINFORCED CONCRETE BUILDINGS

In this paper, it is aimed to evaluate the earthquake incidence angle influence on the seismic performance of buildings. For numerical example, 5-story reinforced concrete building with moment resisting frame and square plan has been analyzed using finite element methods. The building is subjected to 1992 Erzincan earthquake ground accelerations in nineteen directions whose values range between 0 to 90 degrees, with an increment of 5 degrees. The linear time history analyses have been carried out using SAP2000 software. The seismic weight is calculated using full dead load plus 30% of live load. The variation of the maximum story displacements, internal forces such as axial forces, shear forces and bending moments in columns and beams, and principal stresses are studied to determine the earthquake incidence angle influence on the seismic performance. The results show that angle of seismic input motion considerably influences the response of reinforced concrete buildings. It is seen that the maximum displacements are obtained at X and Y direction for 90o and 0o. The results are changed considerably with the different earthquake incidence angle. Maximum differences are calculated as 54.54% and 37.14% for x-y directions, respectively. The result shows that column forces exceeds by varying the angle of excitation of seismic force and the value of axial forces and bending moments may exceed the ordinary cases up to 44%. The structure gets its maximum value of column forces with a specific angle of excitation of seismic force which is different from column to column. The responses are changed significantly as 28.01% and 41.10%. Also, the principal stresses are changed as 12.34%. There is no unique specific angle of incidence for each structure which increases the value of internal forces of all structural members together; each member gets its maximum value of internal forces by a specific angle of incidence.

Keywords:

Earthquake incidence angle influence, finite element method reinforced concrete building, seismic performance,

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[1] Atak, B., Avşar, Ö. and Yakut, A. (2014), “Directional effect of the strong ground motion on the seismic behavior of skewed bridges”, Proceedings of the 9th International Conference on Structural Dynamics, Porto Portugal.
[2] Athanatopoulou A.M. (2005), “Critical orientation of tree correlated seismic”, Engineering Structures, 27, 301-312.
[3] Bayraktar, A., Altunişik, A.C., Türker, T., Karadeniz, H., Erdoğdu, Ş., Angın, Z. and Özşahin, T.Ş. (2015), Structural performance evaluation of 90 rc buildings collapsed during october 23 and november 9, 2011 Van, Turkey, earthquakes”, Journal of Performance of Constructed Facilities, 29(6), 1-19.
[4] Cronin, K.J. (2007), “Response sensitivity of highway bridges to random multi-component earthquake excitation”, Master Thesis, University of Central Florida, Orlando, USA.
[5] Eurocode, (2004), “EN 1998-1-Eurocode 8: Design of Structures for Earthquake Resistance-Part 1: General Rules, Seismic Actions and Rules for Buildings”, [Authority: The European Union Per Regulation 305/2011. Directive 98/34/EC. Directive 2004/18/EC]
[6] FEMA, Building Seismic Safety Council for the Federal Emergency Management Agency (2000), “FEMA368-NEHRP Recommended Provisions for Seismic Regulations for New Buildings and Other Structures”, Washington. D.C., Building Seismic Safety Council.
[7] Fontara, I.K.M., Kostinakis, K.G., Manoukas, G.E. and Athanatopoulou, A.M. (2015). “Parameters affecting the seismic response of buildings under bi-directional excitation”, Structural Engineering and Mechanics, 53(5), 957-979.
[8] Fujita, k. and Takewaki, I. (2009), ‘‘Property of critical excitation for moment-resisting frames subjected to horizontal and vertical simultaneous ground motion’’, Journal of Zhejiang University Science, 10(11), 1561-1572
[9] Fujita, k. and Takewaki, I. (2010), ‘‘Critical correlation of bi-directional horizontal ground motions’’, Engineering Structure, 32(1), 261-272
[10] Gao, X.A., Zhou, X.Y. and Wang, L. (2004), “Multi-component seismic analysis for irregular structures”, 13th World Conference on Earthquake Engineering Vancouver, B.C., Canada, 1156, 1-6
[11] Gonzalez, P. (1992), ‘‘Considering earthquake direction on seismic analysis’’, Earthquake Engineering, Tenth World Conference 1992 Balkema, Rotterdam. ISNB 9054100605
[12] Kanya, S. and Rao, C.M. (2015), “Effect of Earthquake Incidence Angle on Seismic Performance of RC Buildings”, International Journal of Research in Engineering and Technology, 4(13), 156-161.
[13] Kostinakis, K.G. Athanatopoulou, A.M. and Avramidis, I.E. (2013). “Evaluation of inelastic response of 3D single-story R/C frames under bi-directional excitation using different orientation schemes”, Bulletin of Eartquake Engineering, 11,637-661.
[14] Kostinakis, K.G. and Athanatopoulou, A.M. (2015), ‘‘Evaluation of scalar structure-specific ground motion intensity measures for seismic response prediction of earthquake resistant 3D buildings’’, Earthquakes and Structures, 9(5), 1091-1114.
[15] Kumar, N.K. and Gajjar, R.K. (2013). “Non-linear response of two-way asymmetric multistorey building under biaxial excitation”, International J. Eng. Tech., 5(2), 1162-1168.
[16] Lagaros, N.D. (2010), “The impact of the earthquake incident angle on the seismic loss estimation”, Engineering Structures, 32, 1577-1589.
[17] Liang, Z. and Lee, G.C. (2003), “Principal axes of m-dof structures part ii: dynamic loading”, Earthquake Engineering and Engineering Vibration, 2(1), 39-50.
[18] Lopez, O.A. and Torres, R. (1997), “The critical angle of seismic incidence and the maximum structural response”, Earthquake Engineering and Structural Dynamics, 26, 881-894.
[19] Lucchini, A., Monti, G. and Kunnath, S. (2011). “Nonlinear response of two-way asymmetric single-story building under biaxial excitation”, Journal of Structural Engineering, ASCE, 137(1), 34-40.
[20] Magliulo, G. and Maddaloni, G. (2014), “ Influence of earthquake direction on the seismic response of irregular plan RC frame buildings”, Earthquake Engineering and Engineering Vibration, 13, 243-256.
[21] Mohraz, B. and Tiv, M. (1994), “Orientation of earthquake ground motion in computing response of structures”, Seismic Engineering, Pressure Vessels and Piping Conference, Minneapolis, USA, 195-202.
[22] Newton, B. (2014), “Understanding directionality concepts in seismic analysis”, Memo to Designers, 20-17.
[23] Nguyen, V.T. and Kim, D. (2013). “Influence of incident angles of earthquakes on inelastic responses of asymmetric-plan structures”, Structural Engineering and Mechanics, 45(3), 373-389.
[24] Ni, Y., Chen, J., Teng, H. and Jiang, H. (2015), “Influence of earthquake input angle on seismic response of curved girder bridge”, Journal of Traffic and Transportation Engineering, 2(4), 233-241.
[25] PEER (2016), “Pacific Earthquake Engineering Research Centre,” http://peer.berkeley.edu/smcat/data.
[26] Polycarpou, P.C., Papaloizou, L., Komodromos, P. and Charmpis, D.C. (2015), “Effect of the seismic excitation angle on the dynamic response of adjacent buildings during pounding”, Earthquakes and Structures, 8(5), 1127-1146.
[27] Quadri, S.A. and Madhuri, M.N. (2014), “Investigation of the critical direction of seismic force for the analysis of rcc frames”, International Journal of Civil Engineering and Technology, 5(6), 10-15.
[28] Rigato, A.B. and Medina, R.A. (2007), “Influence of angle of incidence on seismic demands for inelastic single-storey structures subjected to bi-directional ground motions”, Engineering Structures, 29, 2593-2601.
[29] Safak, E. and Bendimerad, M.F. (1988), “Peak response of 2-DOF uncoupled oscillator under two-direction base motion”, Earthquake Engineering and Structural Dynamics, 16, 1061-72.
[30] SAP2000 (2015), “Integrated Finite Element Analysis and Design of Structures,” Computers and Structures Inc, Berkeley, California, USA.
[31] Sevim, B. (2013), “Assessment of 3D earthquake response of the Arhavi Highway Tunnel considering soil-structure interaction”, Computers and Concrete, 11(1) 51-61
[32] Song, B., Pan, J.S. and Liu, Q. (2008), “The study on crıtıcal angle to the seısmıc response of curved brıdges based on pushover method”, The 14th World Conference on Earthquake Engineering October, 12- 17,China.
[33] TERDC, Turkish Earthquake Resistant Design Code (2007), “Specifications for Structures to be Built in Disaster Areas,” Ministry of Public Works and Settlement. General Directorate of Disaster Affairs. Earthquake Research Department. Ankara. Turkey. http://www.deprem.gov.tr
[34] Torbol, M. and Shinozuka, M. (2012), “Effect of the angle of seismic incidence on the fragility curves of bridges”, Earthquake Engineering and Structural Dynamics, 41, 2111-2124.
[35] Tun, M. and Htun, Z.M. (2014), “Comparison of the effect of irregular high-rise steel building based on different seismic excitation angles”, International Journal of Scientific Engineering and Technology Research, 3(10), 2252-2256.
[36] Van, T.N. and Kim, D. (2013), ‘‘Influence of incident angles of earthquakes on inelastic responses of asymmetric-plan structures”, Structural Engineering and Mechanics, 45(3), 373-389.

Sigma Mühendislik ve Fen Bilimleri Dergisi-Cover

ISSN: 1304-7191
Yayın Aralığı: Yılda 4 Sayı
Yayıncı: Yıldız Teknik Üniversitesi

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